U.S. Department of the Interior U.S. Geological Survey Topographic Data Update IGOL: Rome September 13-15, 2004 Doug Muchoney USGS.
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U.S. Department of the InteriorU.S. Geological Survey
Topographic Data UpdateTopographic Data Update
IGOL: Rome IGOL: Rome September 13-15, 2004September 13-15, 2004
Doug MuchoneyUSGS
FINAL COVERAGE MAP: FLAT MAP
SRTM: Unfinished 3-arc-second
• All the unfinished 3-arc-sec global data are now available.
• The last 2 areas, Australia and ocean island groups, were released a couple months ago.
• All those data are available via anonymous ftp (as 1x1-degree tiles) from: ftp://edcftp.cr.usgs.gov/pub/data/srtm/
SRTM: Unfinished 1-arc-second
• The unfinished 1-arc-sec data over the U.S. are also available as 1x1-degree tiles on the anonymous ftp site
• The unfinished 1-arc-sec data for the U.S. and 3-arc-sec data for North and South America are available for download and media orders on the seamless server (seamless.usgs.gov).
SRTM: Finished 3-arc-second
• Most of the global 3-arc-sec data are available on media (http://edcsns17.cr.usgs.gov/srtm/index.html).
• The areas of 3-arc-sec finished data that are not yet available are western and southern Africa, and Australia.
• NGA reports that all the final finished data should be done by the end of Sept., so expect that we'll soon have the rest and will have it available for distribution soon thereafter.
SRTM: Finished 1-arc-second
• Finished data, 1-arc-sec data over the U.S. are available on media (http://edcsns17.cr.usgs.gov/srtmdted2/),
Other USGS Activities ….
• Land Cover, Land Cover Trends, Land Cover Derivatives
• Land Surface Parameter
Other USGS Activities ….
• Land Cover, Land Cover Trends, Land Cover Derivatives
• Transportation Derivatives
• Elevation derivatives
• Phenology
• Drought
• Land Surface Parameters, Plot Data
Elevation Derivatives• EDNA is a multi-layered database
derived from a version of the National Elevation Dataset (NED), which has been hydrologically conditioned for improved hydrologic flow representation. The seamless EDNA database provides 30 meters resolution raster and vector data layers including:
• Aspect • Contours • Filled DEM • Flow Accumulation • Flow Direction • Reach Catchment Seedpoints • Reach Catchments • Shaded Relief • Sinks • Slope • Synthetic Streamlines
Land Cover
1976 LUDA 1992 NLCD 2000 NLCD
Land Cover TrendsLand Cover Trends
Cover 1973 1980 1986 1992
Water 1.6% 1.6% 1.6% 1.6%Urban/Built-Up 24.3% 25.1% 26.1% 26.7%Transitional 0.2% 0.2% 0.2% 0.2%Mining/Quarries 0.2% 0.3% 0.3% 0.4%Forests and Woods 33.5% 33.4% 33.2% 33.1%Agriculture 39.5% 38.7% 38.0% 37.4%Wetlands 0.7% 0.7% 0.7% 0.7%
Land cover by Ecoregion
What are the changes in the landscape and how significant are they?
Landsat MSS 1972 Landsat MSS 1980 Landsat MSS 1986
Landsat TM 1992 Landsat ETM+ 2000
North Central Appalachia
Sample Site 1
Remote Sensing and Phenology
Satellite PhenololgyRepeatable observations
Synoptic view
Ability to derive vegetation (greenness) indices
Phenology: Study of the timing of biological eventsbird migration
insect hatching
plant emergence (crops)
bud burst
first leaf
Symptom of global change
Science, June 6, 2003
Seasonal integrated NDVI
Temporal / Phenologic Vegetation Metrics
SPI 7/18/02
Land Cover
Available Water Capacity
Percent Irrigated Farmland
% Avg Seasonal Greenness
Start of Season Date
Regression Tree Modelling
Drought Impact Index
Methodological Approach - Drought
Model Input
Identify variables contributing to drought impact
INPUTS:
Slope Transportation Urban extent Urban exclusion Hillshade Land cover
Model Parameterization - Example using Sleuth
Web
• http://srtm.usgs.gov/
• http://edna.usgs.gov/
• http://gam.usgs.gov
• http://landcover.usgs.gov
Web
• http://srtm.usgs.gov/
• http://edna.usgs.gov/
• http://gam.usgs.gov
• http://landcover.usgs.gov
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